Tributes paid to US actor Robin Williams

The award-winning American actor and comedian, Robin Williams, has died at the age of 63.

He was found at his home in California. Police believe he committed suicide.

Actor J Kristopher worked with Robin Williams last year on the CBS series "The Crazy Ones" and described him as a very humble man who had a gift for making people laugh.

He also said he never had any sense that the actor was unhappy enough to take his own life.